187066889 has 8 divisors (see below), whose sum is σ = 195570240. Its totient is φ = 178594416.

The previous prime is 187066883. The next prime is 187066897. The reversal of 187066889 is 988660781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187066889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 187066889.

It is not an unprimeable number, because it can be changed into a prime (187066883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5147 + ... + 20015.

It is an arithmetic number, because the mean of its divisors is an integer number (24446280).

Almost surely, 2^187066889 is an apocalyptic number.

It is an amenable number.

187066889 is a deficient number, since it is larger than the sum of its proper divisors (8503351).

187066889 is a wasteful number, since it uses less digits than its factorization.

187066889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15439.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 187066889 is about 13677.2398165712. The cubic root of 187066889 is about 571.9160807739.

The spelling of 187066889 in words is "one hundred eighty-seven million, sixty-six thousand, eight hundred eighty-nine".